January 3, 2013, 04:06 AM
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#26
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Senior Member
Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,426
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The M39A3 Revolving Cannon:
http://thefiringline.com/forums/atta...1&d=1314162624
(Note the secondary revolver frame. It was electrically actuated, to provide gas pressure to clear jams.)
http://thefiringline.com/forums/atta...1&d=1314162638
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